arise vs happen

arise and happen both are verbs.

Word	Noun	Adjective	Verb	Adverb
arise	No	No	Yes	No
happen	No	No	Yes	No

As verbs, happen is a hypernym of arise; that is, happen is a word with a broader meaning than arise:

Other hypernyms of arise include come about, fall out, go on, hap, occur, pass, pass off, take place.

arise (verb)	happen (verb)
get up and out of bed	come to pass
result or issue	come into being; become reality
rise to one's feet	happen, occur, or be the case in the course of events or by chance
move upward	come upon, as if by accident; meet with
take part in a rebellion; renounce a former allegiance	chance to be or do something, without intention or causation
come into existence; take on form or shape
originate or come into being